Merge pull request #31 from mgrinspan/patch-1

Fix Warning on PHP8

Author: nekudo

src/Application/Application.php

@@ -16,7 +16,7 @@ protected function __construct()
         // singleton construct required this method to be protected/private
     }
 
-    final private function __clone()
+    final protected function __clone()
     {
         // singleton construct required this method to be protected/private
     }